Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Cathode and lithium battery using the same

a lithium battery and cathode technology, applied in the direction of nickel compounds, cell components, sustainable manufacturing/processing, etc., can solve the problems of increasing structural instability, and achieve the effect of improving electrical characteristics

Active Publication Date: 2013-05-23
SAMSUNG ELECTRONICS CO LTD
View PDF3 Cites 35 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent is about improving the electrical properties of a cathode. The invention includes using a specific material for the cathode active material. This results in better performance of the cathode in terms of its ability to produce electrical current.

Problems solved by technology

A xLi2MO3-(1-x)LiMeO2 (0≦x≦1; M, Me=a metal ion) complex system, which is a high-capacity cathode material of the next generation, may increase structural instability when a cut-off voltage is increased for high-capacity utilization.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cathode and lithium battery using the same
  • Cathode and lithium battery using the same
  • Cathode and lithium battery using the same

Examples

Experimental program
Comparison scheme
Effect test

example 1

Preparation of a Cathode Active Material

[0071]A cathode active material was synthesized by using the following combustion synthesis method. First, as a starting material, lithium carbonate, nickel acetate, cobalt acetate, manganese acetate, and lanthanum(III) nitrate hexahydrate were measured to satisfy the stoichiometry and were dissolved in 200 ml of a dilute nitric acid aqueous solution. Then, 15 ml of a citric acid aqueous solution and 15 ml of ethylene glycol were added to prepare a sol. The sol was stirred and heated on a hot plate to evaporate the water, and thus the mixture was obtained in a gel state. The gel heated on the hot plate until it was burned, and an additional heat treatment was performed after completely decomposing the gel by combustion. The additional heat treatment was performed at a temperature of 950° C. for 5 hours with a dry air flow, and thus a cathode active material powder of 0.5Li[La0.01Li0.32Mn0.67]O2-0.5LiNi1 / 3CO1 / 3Mn1 / 3O2, including the slightest q...

example 2

Preparation of a Cathode Active Material

[0076]A cathode active material was synthesized by using the following combustion synthesis method. First, as a starting material, lithium carbonate, nickel acetate, cobalt acetate, manganese acetate, and lanthanum(III) nitrate hexahydrate were measured to satisfy the stoichiometry and were dissolved in 200 ml of a dilute nitric acid aqueous solution. Then, 15 ml of a citric acid aqueous solution and 15 ml of ethylene glycol were added to prepare a sol. The sol was stirred and heated on a hot plate to evaporate the water, and thus the mixture was obtained in a gel state. Combustion of the gel was also performed on the hot plate, and an additional heat treatment was performed after completely decomposing the gel by combustion. The additional heat treatment was performed at a temperature of 950° C. for 5 hours with a dry air flow, and thus, a cathode active material powder of 0.5Li[La0.01Li0.32Mg0.02Mn0.65]O2-0.5LiNi1 / 3Co1 / 3Mn1 / 3O2, including th...

experimental example 1

Analysis of Crystalline Structure

[0081]FIG. 2 illustrates the results of the X-ray Diffraction (XRD) analysis of the cathode active materials obtained in the Comparative Example and Examples 1 and 2. From the XRD analysis of FIG. 2, the cathode active material of Example 1 had a secondary state which included LaNiO3. LaCoO3, and LaMnO3 of a perovskite structure. The cathode active material of Example 2 included LaNiO3, LaCoO3, LaMnO3, and LaMgO3 of a perovskite structure.

[0082]Peak positions of the LaNiO3, LaCoO3, LaMnO3, and LaMgO3 are as follows:

[0083]LaNiO3: 32.893 (110), 33.191 (012), 47.332 (202);

[0084]LaCoO3: 33.015 (110), 33.421 (104), 47.596 (024);

[0085]LaMnO3: 32.412 (112), 45.668 (220), 47.280 (221); and

[0086]LaMgO3: 32.608 (121), 32.702 (200), 46.740 (202).

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A cathode and a battery including a cathode active material including a layer-structured material having a composition of xLi2MO3-(1-x)LiMeO2; and a metal oxide having a perovskite structure. The cathode active material may have improved structural stability by intermixing a metal oxide having a similar crystalline structure with the layer-structured material, and thus, life and capacity characteristics of a cathode and a lithium battery including the metal oxide may be improved.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit of Korean Application No. 10-2011-0121191, filed Nov. 18, 2011, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.BACKGROUND[0002]1. Field[0003]Aspects of the present invention relate to a cathode and a lithium battery using the same, and more particularly, to a cathode with improved electrical characteristics and a lithium battery that uses the cathode.[0004]2. Description of the Related Art[0005]In general, transition metal compounds such as LiNiO2, LiCoO2, LiMn2O4, LiFePO4, LiNixCo1-x.O2 (0<x<1), and LiNi1-x-yCoxMnyO2 (0≦x≦0.5, 0≦y≦0.5) are used as cathode active materials for lithium batteries.[0006]Next generation lithium batteries can be accomplished by improving high-rate discharge performance and high discharge capacity characteristics of the cathode active materials. As portable electronic devices are becoming more complex and diverse i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01M4/485H01M4/525H01M4/505H01M4/64
CPCH01M4/364H01M4/131H01M4/505H01M4/525H01M10/0422H01M10/0525Y02E60/122C01G45/1228C01G45/1264C01G51/70C01G53/70C01P2002/34C01P2002/72C01P2002/88C01P2004/03C01P2004/61C01P2004/62C01P2004/82H01M4/485Y02E60/10Y02P70/50H01M4/58H01M10/052
Inventor KIM, MYUNG-HOONPARK, KYU-SUNGPARK, MIN-SIKPARK, JIN-HWAN
Owner SAMSUNG ELECTRONICS CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com